Set bike per workout and more style changes

templates/users_and_workouts_wrapper.html

@@ -0,0 +1,9 @@
+{% for u in users %}
+{% with user=u, workouts=u.workouts, bikes=bikes %}
+{% include 'workouts_list.html' %}
+{% endwith %}
+{% endfor %}
+
+{% with users=users, bikes=bikes %}
+{% include 'users.html' %}
+{% endwith %}